Peters Township Sanitary Authority

Transcription

1 Peters Township Sanitary Authority Friar Lane Sewershed Resident Meeting June, 011 Agenda What is the Goal of the program? Why Friar Lane? Proposed Pilot Program Next Steps Conclusion Questions GOAL: To identify and remove sources of groundwater infiltration into the sanitary sewer system Goals: Reduce Inflow & Infiltration (I&I) into the sewer system Reduce the need to expand treatment facilities Reduce the need to expand sewer interceptors Reduce the need to increase user fees Help to keep sewage from exfiltrating Reduce and eliminate SSO s What is Inflow & Infiltration? Inflow is groundwater that is directly connected to the sanitary sewer system. Infiltration is ground water that indirectly enters the sanitary sewer through defects in the sewer pipe. Authority Wet Weather Improvements 011/01 BR Wet Weather Improvements $1,500,000 DC Treatment Plant 1999 Flow meter Purchase $19, Phase I Improvements 000 Stonebrook Grout/Point $89,300 $630,000 Repairs 00 Inlet Sewer Improvements by Staff $5, Brush Run I/I Study by LSSE $100, Gateshead Drive Lining ( projects) $0,000 Subtotal Plant Capacity Expansions $,317, General Wet Weather Investigations $, Upper Valleybrook Grout/Point Repair $8,000 Brush Run Interceptor/Trunk Sewer Augmentations 00 Stonehenge Grouting $73, VB McMurray Road PennDOT Interceptor Aug 00 Friar Lane CIP Lining $77,000 $60, Stonebrook Trunk Augmentation Phase A $106, Marble Drive E- Replacement $10, VB Old Interceptor Repairs/Augmentations $8, Crossgates Trunk Replacement $316, Stonebrook Trunk Augmentation Phase B $30, Crestview Acres Phase Underway $1, VB Augmentation Opeka to Stonehenge $97, Crossgates CIPP Lining 1st year $99, VB PennDOT Slide Intercept Augmentation $135, Manhole Rehab 3-year project $170, VB Aerial Crossing Augmentation by Staff $6, Crossgates CIPP Lining nd year $166, VB Augmentation with Gabion Baskets $100, Rutledge Drive Grout/Point Repair $58, BR Peak Flow Alternative Project $1,983 Subtotal Brush Run Rehabilitation $1,96, Upper VB Augmentation 008 Cost to Date $307, Willoughby Woods Interceptor Augmentation $8, VB Pelipetz Drive Augmentation $,000 Brush Run Subtotal Augmentations $1,389,383 DC Collector/Trunk Sewer Rehabilitation 001 East Highland Replace/Lining $00, Fieldbrook/McNary Grout/Point Repair $113,000 DC Interceptor and Trunk Sewer Augmentations Subtotal DC Rehabilitation $513, Oakwood Road Interceptor Augmentation $00, Giant Oaks Interceptor Modeling $1, Giant Oaks Pipe Burst Waterdam Road $158,000 Misc. Staff Time and Materials to remove I/I 003 Oakwood/Stratford Grinder Pumps $39,700 $50,000/year for 15 years $750, Waterdam Grinder Pump $9, McDowell Lane $15, LSSE Interceptor Flow Monitoring and Modeling $38,700 DC Subtotal Interceptor/Trunk Augmentations $6,600 Subtotal ALL Sewer Augmentations $1,851,983 TOTAL CAPACITY EXPANSIONS $,168,983 TOTAL REHABILITATION $3,189,700 GRAND TOTAL ALL I/I PROJECTS $7,358,683 1

2 Why Friar Lane? Engineering studies show the Friar Lane Sewershed ranks high for inflow & infiltration Infrastructure Investment by the Authority Relined 7,68 LF of collector sewer pipe at a cost of $77,000 Wet Weather Investigation and data review Inspections on eight separate occasions by the Authority and contracted services Reference Sewershed Concept Friar Lane E. Edgewood Meadow Ridge Influent Flow and RAS Flow, MGD The Affect of Precipitation on the Sewer System Brush Run WPCP November 30, 010 Peak Rain Event December 1 November Precipitation, inches Friar Lane Reaction to Rainfall During Peak Rain Events (-Hour Volume) Newer PVC Sewer Systems <100 GPD/EDU Brush Run System Overall 1,600 GPD/EDU Friar Lane Sewershed 13,000 GPD/EDU 1 0 7:00:00 1:00:00 5:00:00 10:00:00 3:00:00 8:00:00 1:00:00 6:00:00 11:00:00 :00:00 9:00:00 :00:00 7:00:00 1:00:00 5:00:00 10:00:00 3:00:00 8:00:00 AM PM PM PM AM AM PM PM PM AM AM PM PM AM AM AM PM PM 0 Influent Flow Precip Friar Lane Wet Weather Inspections After Rehabilitation. Conducted when BR Plant was at 5 MGD Very little infiltration from the public sewer 39% of dwellings discharge <1 GPM. No repairs required. 61% discharge >1 GPM. Repairs needed. 18% of total inspected discharge >3 GPM 8% of total inspected discharge >8 GPM Extrapolating Friar Lane Results to BR System-Wide 70% of the customers have Non-PVC sewers,00 customers X 0.70=,900 customers considered similar to Friar Lane. 18% of,900 customers=50 customers may discharge > 5 MGD Could discharge >6 MGD Say 8 GPM average at 10 MGD 8 GPM/EDU X 50 customers =,160 GPM = 6 MGD peak flow may come from these 50 customers or 60% of the problem comes from 1% of the customers!

3 Proposed Pilot Program Rainfall Simulation Testing: C & K Industrial Services: Professional, uniform and proven testing method. Testing is not dependent on natural rainfall. Building Drain Building Sewer What Will be Tested Inflow due to improper material and connection. Vent Stack Deficiency Roots entering from a defective joint. Root Infiltration Multiple points of inflow from a defective pipe joint Infiltration Closed Circuit Television Inspection Closed Circuit Television (CCTV) utilizes special video cameras that are inserted into the sewer to observe pipe conditions and to document defects that lead to Inflow and Infiltration (I&I). 3

4 Authority Funded Repairs, if needed: The Authority will determine the extent and type of repair necessary Authority will pay for repairs to a cumulative maximum of $3,000 per participant. If repairs are required, the owner will not receive the $00 payment for participation. Repairs made by the Authority will be warranted for one year. Authority will pay for all testing done in-house or contracted. Authority will pay for any driveway restoration, if needed. Homeowner Responsibility, if needed: Homeowner will pay to have illegal direct connections such as downspouts, area drains, or sump pumps and sump pump overflows connected to the sanitary system disconnected. Homeowner will pay for any final lawn restoration, if needed. Other Benefits to the Homeowner: If the property passes testing, and repairs are not required, the owner will receive a minimum payment of $00 for participation. If your home passes the test, or repairs are made to correct deficiencies, the Time of Sale Dye Test, and its $150 fee, will be waived for one year. Items to Consider The Authority will make multiple visits to your property over a long period, even if you home passes initial testing. Repairs my identify other deficiencies due to water migration. If trees and other plantings must be removed, the Authority will not replace them. Benefits to the Community at Large The pilot program will help the Authority to develop a program to address the issue of groundwater infiltration. Once implemented, this program may help us avoid large capital expenses in unnecessarily treating fresh water. Possibly avoid Tap Bans,, EPA Enforcement Actions Help to keep sewer fees low for all residents of the service area. Protect the environment. Next Steps Obtain participation from the majority of the 83 property owners in the Friar Lane Sewershed. Property owners sign Right of Entry Agreements with the Authority Test and inspect all participating properties. Work with property owners to correct building sewer deficiencies Document post-rehabilitation flow results Replicate the process throughout our service area

5 Conclusion Wet weather flows need to be reduced by correcting defects in private building sewers We need the cooperation of the residents in the Friar Lane sewershed in this Pilot Project This project will be valuable to you as homeowners The results of this program will benefit the Authority and all it s s customers Questions? Please reply no later than July 8th 5